Ore-concentrator.



No. 67l,348.

Patented Apr. 2, l90l.

J. H. MICHELSEN.

ORE CDNCENTBATOR.

(Application filed Dec. 6, 1900.)

2 Sh.eets-Sheet I.

{No Model.)

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' No. 671,348. Patented Apr. 2, 1901.,

J. H. MICHELSEN.

ORE GONGENTRATOR.

(Application filed. Dec. 6, 1900.) (No Model.) 2 Sheets- Sheet z.

* llunnuumg UNITED STATES PATENT OFFICE.

JOHN H. MIOHELSEN, OF BUTTE, MONTANA, ASSIGNOR OF ONE-HALF TO MILLER LAMOTHE BORGLUM, OF SAME PLACE.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent N 0. 671,348, dated April2, 1901.

Application filed December 6', 1900. Serial No. 38,903. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. MIOHELSEN, a citizen of the UnitedStates,residing at Butte, in the county of Silverbow and State ofMontana, have invented certain new and useful Improvements in Ore-Concentrators; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in ore-concentrators, and has forits object to provide a concentrator which will have a bet ter actionthan similar machines now ordinarily in use and which will thereforeproduce better results. 7

This invention is a specific improvement upon my former patent, No.636,679, dated November 7, 1899. I

My invention consists in the novel device hereinafter described,andparticularly pointed out in the claims. 1

In the accompanying drawings, Figure 1 shows a plan view of my improvedore-concentrator. Fig. 2 is a side elevation of the same. Fig. 3 is an'end elevation of the same. Fig. 4 is a detail view, on an enlargedscale, showing the toggles and spring. Fig. 5 is a top view of the meansfor varying the inclination of the table.

The machine comprises a stationary frame made of longitudinal timbers a,rigidly connected by cross-timbers b. A driving-shaft. c is located injournals near one end of the frame,which shaft is provided with"adrivingpulley e and afly-wheel d, although the latter may be omitted,ifdesired. It is of course evident that a sprocket wheel and chain may besubstituted for the pulley and belt to drive the concentrator. On theshaft 0 is mounted an eccentric f, between two short beams or braces g.This eccentric may be made adjustable, if desired, to vary the throw ofthe machine. To this eccentric f is attached the pitman h, which by itsreciprocation shakes the table. A short connecting-rod 10 is attached tothe bottom of the table, and connecting this connecting-rod 10 with thepitman It is a frame composed of four arms 70 Z m Z, pivoted together attheir ends. Coiled around this connecting-rod 10 is a spring 7 havingone of its ends abutting against the vibratory table and its oppositeend against an abutment on the frame of the machine. At the end of thepitman h are two short links it, each of which is pivoted to the pitmanhand to a toggle 0, the members of which are connected,respectively,toone of the cross-beams b and to the side of the frame m. A belt 13,driven from the shaft 0, drives the elevatingwheel q, mounted inhearings on one of the beams a. This wheel q is provided withelevating-buckets 0", which discharge into a vessels. A pipe t runs fromthis vessel 8 and delivers water therefrom onto the table 2. Anotherpipe u is connected to the receivingtrough 1;, into which the table adischarges, and conducts the water back to the elevatingwheel q, whilemud, &c., is discharged into the trough w, situated below the end of thetrough Q).

The table .2 is provided with waved riffles 1, which vary in length, theshortest being at one side of the table near the receiving-trough andthe longest being on the other side. The table is supported in the usualway by antifriction-rollers 9, which are located between cup-shapedbearings, which are situated, respectively, upon the tables and thesupports thereof. To vary the inclination of the table, one side thereofis supported by the movable beam 5, which extends along one side of saidtable. This beam is supported by three pairs of links 6, 7, and 8,pivoted to one of the side beams a and to the beam 5. A bolt 11 passesthrough the beam a and supports and unites each pair of links. At aboutthe middle of the links 8 are attached by pivots 12 two side bars1S,guided by clips 16 upon the beams at. These side bars are united byan end bar 15, which carries a perforated block 19 for the reception ofan adjustingwheel13. This wheel carries a screw-threaded rod 14, whichworks in a nut carried by the arm 17, attached to the beam Ct, which iscut away for this purpose. It will be obvious that by turning the wheel13 the beam 5 will be raised or lowered, carrying with it the table. Atone corner of the table is the feeding-hopper oc,which is providedwithaseries ofholes y, which deliver the crushed ore, whether mixed withwater or dry, upon the table. A pipe 2 extends nearly the whole lengthof the table. This is provided on its under portion with a series ofopenings 3, which deliver upon a convex spreading device 4:. Water issupplied to this pipe in any desired way and serves when the table-isshaken to concentrate the ore by carrying off the lighter and usuallyworthless particles. By means of pipe u the water which has been used towash the ore may be used over again repeatedly. This is of greatadvantage in certain sections where the water-supply is limited. It alsoaffords means of saving the float-gold, so called, which is so lightthat it is carried off by the water. Mercury may be deposited, ifdesired, between the rifiiles 1 to catch the particles of gold andsilver. This mercury will be retained upon the table by thepeculiarlyshaped riftles employed, the mercury being unable to pass thewaves in the 'riffles. If desired, the table may be braced by means ofbraces 20 on its under side, and it may be held in position by aprojection 23, located at the junction of the braces 20, whichprojection 23 is guided by angle-plates 22 upon the projection 21,carried by one of the crossbeams b of the machine.

The operation is as follows: Ore is fed into the hopper as, either mixedwith water or in the form of powder, and passes out through theopeningsy onto the table a. The shaft 0 is rotated, and by the medium of thetoggle-and-spring connection a rapid vibratory movement is given to thetable water being supplied at the same time to the pipe 2. This shortquick vibration would be so jerky as to be objectionable were it not forthe use of the coiled spring '5. By the use, however, of the toggles andspring I am enabled to give a very rapid vibratory motion to the table,

which motion is at the same time smooth and even, all lost motion beingtaken up. Concentration takes place on the table, due to its rapidmovement and the .flow of water thereover. The clearer part of thiswater is taken from the trough a; and led back to the elevating-wheel g,by which it is againcarfried back to the table.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

1. In an ore-concentrator, the combination with a main frame, avibratory table mounted thereon, means carried by said frame foradjusting the height of one side of said table, and means for deliveringthe material upon said table; of a main driving-shaft, a pitmanconnected to and adapted to beoperated from said main shaft, aconnecting-rod connected to said table, a frame secured to saidconnecting-rod, compound toggles mounted in said frame, one pair of saidtoggles forming a connection between saidframe and the main frame, and atoggle forming a connection between said pitman and the above-mentionedtoggles, substantially as described.

2. In an ore-concentrator, the combination with a main frame, avibratory table mounted thereon, means carried by said frame foradjusting the height of one side of said table, and means for deliveringthe material upon said table; of a main driving-shaft, a pitmanconnected to and adapted to be operated from said shaft, aconnecting-rod connected to said table, a frame secured to saidconnecting-rod, compound toggles mounted in said frame, one pair of saidtoggles forming a connection between said frame and the main frame, atoggle forming a connection between said pitman and the above-mentionedtoggles, and a coiled spring mounted upon said connectingrod, andinterposed between said main frame and table, substantially asdescribed.

3. In an ore-concentrator, the combination of a supporting-frameprovided with a projection, a vibrating table provided with rifflessupported on said frame and guided by said projection, means for varyingthe inclination of said table, a rectangular frame connected to saidtable, a pair of toggles connected to the frame of the machine and saidrectangular frame, a pitman, links connecting said pitman with saidtoggles, a coiled spring having one end abutting against the frame ofthe machine, and its other end bearing against an abutment on thevibrating table, an elevating-wheel, a pipe for delivering water fromsaid table to said wheel, and means for driving said pitman andsaid'wheelysubstantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

- JOHN H. MIOI'IELSEN. Witnesses:

AUGUSTUS T. MORGAN, MILLER BORGLUM.

